Beating up mechanism for looms, especially for manufacturing terry toweling



June 3, 1952 BERG 2,599,313

- BEATING u MECHANISM FOR LOOMS, ESPECIALLY FoR MANUFACTURING TERRY TOWELING Filed April 1, 1950 Inventor 6057M 5m 5 C m 159 M Attorney 5 Patented June 3, 1952 QEAFJE NG UB- MEC MSM EOR v ,a -9l\ S ESBEG A LY FOR MANUF CTURI G TE Y TQWYELI Gustav Berg, Glasgow, Scotland .Annli aticn r- 9 .$e a1No-- 3 359 n Qr stt A ri 19 .9

' Thisimrnti n relate to a rai sl i ni m c loomswh ch i a apted o effect th prod uctign of pile fabric and inwhich the weft is only arti lly bea en-up t r a given numb 'Q ri he o instanc we or t r e and h n i ful beat n-up on] th xt picathus ti ht y heatin home. that i k of e t: an y o s partially beaten-up piclgreferredpto usually as a o s ic a d imi uriou ly p u n pile loops in the warps. Primarily the invention i i ndedfo us in t e ma u u o ry tpwelling, but it may also be ioungl to be siiitable o the ranui ciu fs Q pile fabrics t r t tpyvelling. In particular, the invention relates to beatingup mechanism ofa previously proposed type in which the beating-up movement is transmitted to the reed structure by a thrust member which has an eccentric adapted, upgn rotation, to vary the efiective beating-11p movementtransmitted to the reed and-inwhich eccentric-control-means are provided for holding said eccentric apnedete'rmined position relative tosaid member and for causing rotation of the eccentric from said position when required.

' According to the present-invention, the eccentric-control means are so related to the eccentric that they bring it approximately --into its dead centre position-for the performance of each full Preferably, the eccentric,-the means for hold. ing it in position and the means for rotating -it iromsuch position are all aligned to act in the same-plane.

An example of .bea-tingeup mechanism accord- :ing to -the invention is showniin theiaccomipanyingtdrawi-n-gs, in which:

Fig. 1 is an elevation, being :partly in :section of the mechanism. Fig. 2 is a plan ,ofgcomponents-of .themechanism, :being partly in section .on the line :;22 .of Fig. "-IThose pontiQQsofgEig. 11 "shown in vsection arcsections v-m1 :the line film-i .of-i-Eig. 2.

mechanism includes the aha-tier; .10; *sl y prisin a ce.ed strut and c, which .are pivotally monntedvat.5 n at .i t htatiqm ary irame =1 .oithe 100m. As usual. there are two swords 5, one at each .end :of the reed strg ctprg, :butin the drawings only one sword and 1 55 .91 ated parts are shown. The beatings-mp mecha: nism also includes. arota-ry crankshaft ;=B-:which is journalled as -usual in bearings=.:(not shown) the frame I and which incorporates :a crank .pin 9 coupled by-a connecting mod it @to the associated swordsi, the connecting rod being the 5 Claims. (Cl. 139.-26)

thrust member through which each beat-up is transmitted {rem-the shaft =8 to the reed structure 4; The eccentric by which theextent-o-f the beating-up movement oft-he reed is -varied-is denoted by -'H i in the example shown, the larger end of the connecting rod H) embraces strapwise-the eccentried], ofwhich the eccentricpi-n I2 is journalled in the manner oftrunnions in-bearings provided-byspaeed iormations -I3-on the associated' sword-'5. -=The-control means forholding and rotating the eccentric ll include two plates :14 secured to opposite sides of the eccentric and formed =to-act jointly as alever having effect twoarms. 'I'he-p1ateS M'formi-ngthis two-armed lever both come between the spaced formations 13. One of saidarms has-a --pivota1 connection at :15 to the top end of a spring l-6 which is anchored atits bottom end, at 1 1, to the sword 5. The otheriof saidarms hasa hardened steel pm Hi adapted to ztorm a pivotal connection with a nearlyhorizontal steel control rod i9 arranged above the eccentric and formed with a hardened hook to engage the pin l8.

The :lever constituted by the side .plates 1 d-wi-th the pin .18, the-spring L6 and the @OIltIOldOd-l-B with itsxhook 20 are the means whereby the eccentric .II is :held in position and isrotated 'thereiirom. All of these parts are arranged in Ethel-same vertical vplane as the crank- Q and connecting rod [0 this plane being'representedby the line 1-! in Fig. 2. Thus the -actions-;o fall of these parts on thereed structure l-are in preciseialignment, which ensures the most efiective and efiicient modeofoperation and which avoids twisting stresses and-distortion during -the h eavy thrust of each ;f-ull beatup.

Gam mechanism, or other selection means such asaiacquard or adobby, is applied to the controlrod F9 for moving-it into or out of the =level at whichits hook-20 -;is;engageable with the pin l8 to hold it. In the example the contrgl'of the rod 1.9 is efiected by -a--cain 21 on a rotary shaft s22. The rod 19 ispivotall-y attached at one end=23 to onearmi i of a bell-crank leverwhose other-arm Z-E is pulled by a spring 26to hold1the level M 2 5 and therefore the ;-'hook in posi- :iip deie n rb a t 1 wh ch has against abracl iet-Zil on theloom frame l; "The control rod l9rests upon a cam-pperated rod lfi, a pin--30 on "the control rod engaging in a slot 3] at the top of the cam-operatedrpd.

lnoperation, the beating up mechanism according to-the example is timed so that the reed pex-forms firstly a partial beat-up giving sequence of this rotational displacement of the eccentric H, the reed 4 is withdrawn a short distance relative to the crank pin 9, so that only a partial beat-up is performed. Following the performance of two such partial beat-up operations, the hook is lifted by the cam ll clear of the pin l8, as shown in full lines in Fig. 1. Thus, the eccentric H is allowed to remain in its normal position, which is its dead centre position, and in this position the reed 4 is at its maximum distance from the crank pin .9, so that a, full beat-up operation is performed. As Fig. 1 shows, at the limit of the beat-up .movement, the centres 32 and 33 of the eccentric pin 12 and of the eccentric ll itself are in the line of thrust of the crank and connecting rod, this line being the line 2-2 in Fig. 1. In other words, during the full beat- .up action, the connecting rod I0 thrusts through the eccentric H as though both parts were a single rigid member. Thus, there is no tendency on the part of the eccentric l I to become rotata- -,bly displaced under the thrust and so no extra being a negligibly small increase in the tension of either the spring 16 or the control rod l9.

Means for making such a small regulation of the limit of the full beat-up movement as may be required are provided, namely, an adjustment set-screw 34 which is secured to the lever plates [4 and contacts with the reed structure 4.. Adjustment of the screw 34 is an act which is done more or less only when the loom'is being first put into use, there being no need for further adjustment during normal operation. v The example shown represents an especially useful arrangement. vIt will be noted that the lever l4, l4 extends upwards from the eccentric and holds the pin [8 at a rather high level above the crank-and-connecting rod mechanism. The control rod l9 also is arranged at a similar high level. Thus these parts 18 and I9 are quite remote from the other part, applied to the lever 4 about which the hooked rod [9 pivots. In the example the said adjustment means consist of the previously mentioned stop 21 and the abutment bracket 28. As shown in Fig. 1, the stop 21 is a set-screw which is carried by a bracket 35 on the lever arm 24. Seeing that the lever 24, 25 is a stationary component and seeing that the parts 23 to 21 are arranged out of the way of the working parts 8-l4 of the beat-up mechswords 5 supporting the reed structure.

l4, l4, namely the spring l6. This arrangement facilitates the location of the various parts on the same axis |l, Fig. 2.

The pile loops formed in the warps of the fabric being woven depend for their length upon the difference between a full beat-up and a partial beat-up. Seeing that the difference is for the time being of the anchorage of the rod end 23.

It is a feature of the invention that the length of :the pile loops is regulatable at the will of the operator, and therefore means are provided for adjusting the location of the anchorage, at 23.

anism, the operator can very easily adjust the set-screw 21 and in this way regulate the length of the pile loops as required for the fabric being woven. It will be manifest that only the part 21 requires adjustment in order to vary the loop length.

Virtually, adjustment of the part 21 has the same effect as though the anchorage 23 was permanently stationary an the length of the rod 19 was shortened or lengthened.

It has already been explained herein that for a full beat-up the eccentric. ll occupies its dead centre position, which is adjustable although only slightly by the set-screw 34. It will be appreciated that any angular adjustment of the eccentric I I at the dead centre position corresponds to a notably non-equivalent, i. e. a comparatively slight, adjustment of the beat-up positionv of the reed structure 4. In contra-distinction, when the pin [8 is held by the hook 2i] and the eccentric H is rotated through the substantial angle requisite for a satisfactorily diminished partial beat-up, the cocentric then occupies an angularly ofiset position in which any angular adjustment of the eccentric results in a somewhat equivalent adjustment of the beat-up position of the reed structure 4. That is to say, even a substantial adjustment by the screw 34 has only a comparatively slight effect on the final beat-up position of the reed structure 4, whereas a substantial adjustment of the screw 21 has an equally substantial effect on the beat-up position and is useful for regulation of the length of the pile loops.

In the loom, mechanism such as described is provided in association with each of the two A further advantage of the present symmetrical arrangement illustrated by Fig. 2 is that the parts for both sides of the loom are identical (that is, parts at opposite sides are not made to opposite hands) thus reducing the amount of spare parts required and so minimizing maintenance costs. Such similarity of parts applies not only to those shownin Fig. 2 but also to the control rod l9 and the parts 24-29 which support and actuate it.

I claim:

1. In a'terry fabric loom comprising a reed structure, beat-up mechanism for operating the reed structure, a rotatable eccentric connecting said mechanism to the reed structure, a lever arm extending from the eccentric and a pivotal member for engaging said arm in order to rotate the eccentric between positions for transmission to the reed structure ofa full beat-up and a partial beat-up, alternatively, the combination of means co-operating with said lever arm to hold the eccentric in one of its dead centre positions for transmission of a full beatup, inter-engageable parts on said pivotal member and said lever arm arranged to rotate the eccentric into a position intermediate said dead centre positions to transmit a partial beat-up, and adjustable means in a location clear of the working parts of the beat-up mechanism for adjusting said pivotal member at will in order to regulate the length of the pile loops by regulating the oifset angular position of the eccentric for a partial beat-up.

2. In a terry fabric loom comprising a reed structure, beat-up mechanism for operating the reed structure, a rotatable eccentric connecting said mechanism to the reed structure, the eccentric being arranged in a vertical plane, a lever arm extending from the eccentric and a pivotal member for engaging said arm in order to rotate the eccentric between positions for transmission to the reed structure of a full beatup and a partial beat-up, alternatively, the combination of means arranged to co-operate in said vertical plane with said lever arm to hold the eccentric in its dead centre position for transmission of a full beat-up and inter-engageable parts on said pivotal member and saidlever arm arranged to rotate the eccentric into a position in which it is offset angularly from dead centre position by an amount sufficient to transmit a partial beat-up, both of said parts also being arranged in said vertical plane.

3. In a terry fabric loom comprising a reed structure, said structure including a sword at each end, beat-up mechanism for operating the reed structure, said mechanism comprising a crank and connecting-rod, a rotatable eccentric connecting said mechanism to the reed structure, a lever arm extending from the eccentric and a pivotal member for engaging said arm in order to rotate the eccentric between positions for transmission to the reed structure of a full beat-up and a partial beat-up, alternatively, the combination of a spring connecting said lever arm to sad sword and striving to hold said arm with said eccentric in its dead centre position for transmission of a full beat-up, and inter-engageable parts on said pivotal member and said lever arm arranged to rotate the eccentric against the action of said spring into a position in which it is offset angularly from dead centre position by an amount sufiicient to transmit a. partial beat-up, said sword, crank and connecting rod, lever arm, spring and pivotal 6 member all being located and arranged to operate in one vertical plane.

4. In a terry fabric loom according to claim 3, a stop device arranged between the lever arm and the sword to determine the setting of the lever arm corresponding to the dead centre position of the eccentric, said device being adjustable to regulate said position.

5. In a terry fabric loom comprising a reed structure, beat-up mechanism for operating the reed structure, a rotatable eccentric connecting said mechanism to the reed structure, the cocentric being arranged in a vertical plane, a lever arm extending from the eccentric and a pivotal member for engaging said arm in order to rotate the eccentric between positions for transmission to the reed structure of a full beatup and a partial beat-up, alternatively, the combination of means arranged to co-operate in said vertical plane with said lever arm to hold the eccentric in one of its dead centre positions for transmission of a full beat-up, inter-engageable parts on said pivotal member and said lever arm arranged to rotate the eccentric into a position intermediate said dead centre positions to transmit a partial beat-up, both of said parts also being arranged in said vertical plane and adjustable means in a location clear of the working parts of the beat-up mechanism for adjusting said pivotal member at will in order to regulate the length of the pile loops by regulating the ofiset angular position of the eccentric for a partial beat-up.

GUSTAV BERG.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 396,964 Strobel Jan. 29, 1889 936,310 Davidson Oct. 12, 1909 1,776,759 Hrdina Sept. 23, 1930 2,082,888 Herard, Jr. et a1. June 8, 1937 2,299,004 Berg Oct. 13, 1942 

